Inductive Voltage Transformer EOF high voltage

Inductive Voltage Transformer EOF high voltage

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Inductive Voltage Transformer EOF high voltage,
Oil-paper insulated inductive voltage transformers type EOF,
are used in high voltage networks within the 24-245 kV range.
They transform high voltage into standardised values for meters,
measuring and protection devices.

Features

  • Protection of the secondary winding from transient overvoltages in the high-voltage network through capacitively coupled shielding
  • Protection against occurring ferroresonance through low operating inductance in the iron core
  • High operating safety as there are no active parts in the insulator
  • Minimum oil volume through optimised design

Technical data

Type EOF

24

36

72

123

145

170

245
Standard IEC / IEEE
Highest voltage for equipment kV 24 36 72.5 123 145 170 245
Rated power-frequency withstand voltage kV 50 70 140 230 275 325 460
Rated lightning impulse withstand voltage kV 125 170 325 550 650 750 1050
Frequency Hz 16.7 / 50 / 60
Accuracy class 0.1-3; 3P; 6P
Rated thermal limiting output VT part VA ≤ 1500 ≤ 3000
Max. simultaneous burden (cl. 0.2) VA 200 300
Max. number windings 5

Type EOF

24

36

72

123

145

170

245
Height of unit* A mm 1107 1107 1430 2116 2392 2581 3507
Height to primary terminal* B mm 1027 1027 1350 1976 2252 2441 3206
Depth of unit including terminal box C mm 526 526 526 710 710 730 938
Depth of unit base D mm 360 360 360 500 500 500 660
Width of unit base E mm 360 360 360 520 520 520 660
Distance between screw holes at base F mm 310 310 310 450 450 450 600
Min. creepage distance*   mm 950 950 1860 3080 3900 4394 6160
Approximate weight*   kg 115 115 125 305 330 335 350

 

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